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NEW YORK (CBSNewYork/AP) — A man accused of killing four people and wounding four others in a 28-hour rampage in New York City pleaded not guilty to murder charges on Tuesday.

Maksim Gelman was ringed by guards as he appeared Tuesday in Brooklyn court. He is being held without bail.

Gelman has already pleaded not guilty to assault and attempted murder in Manhattan, where he was tackled and arrested by police on a subway train near Times Square.

After allegedly killing his stepfather, Aleksandr Kuznetsov, 54, in the family’s Brooklyn apartment, Gelman went to the home of a female acquaintance, Yelena Bulchenko, 20, police said. Bulchenko’s friends have said he was obsessed with her and imagined a romantic relationship with her.

Gelman was also accused of running down a pedestrian, carjacking and other violence.

(TM and Copyright 2011 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)